Hi Mike,
For the record I was suggesting you get the file and change the style to _HEART to see if you get the weird out of tune measures. But I'm good.
When you change styles you are changing the Realtracks. As you know Realtracks are studio audio recorded instruments.
BIAB then uses these audio recordings to fit a chord progression entered by a user and of course you may end up with weird out of tune measures. Therefore you have to spend time with those " weird " tracks to edit those audio tracks ( since they are not midi ) by perhaps selecting/setting it to a more simple or even held.
this is a screen shot of a Realtrack i am working on at this moment
Sorry if i caused you some confusion with my explanation and in fact even this explanation may be confusing as well.